to avoid low blood sugar. tell your healthcare provider about all medicines you take and all of your medical conditions including if you are pregnant or breastfeeding. most common side effects include reactions at the injection site, weight gain, swelling of your hands and feet and vision changes. other serious side effects include low blood sugar and low potassium in your blood. get medical help right away if you experience serious allergic reactions including body rash, trouble with breathing, fast heartbeat sweating or if you feel faint. flexpen is made by novo nordisk, a healthcare company committed to diabetes care for nearly 90 years. i've made flexpen part of my routine just like spending time with my family. ask your healthcare provider about novolog mix 70/30 flexpen today. learn more about the different insulins available in flexpen at myflexpen.com. flexpen. insulin delivery that goes with you. i'm bonnie and this is my cvs. i don't have time for the flu. that's why i'm knocking things off my to-do list. vitamin d -- done. hand sanitizer -- done.